13 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. High confidence.
Trearddur Bay scuba diving weather
Shore dive · Anglesey, North Wales · Show on map
Hour by hour today
Tap an hour to see it above
| Time | Score | Waves | Wind (gusts) | Current | Swell | Tide | Water | Air | Rain | Limited by |
|---|---|---|---|---|---|---|---|---|---|---|
| 1.6 m | 22 (36 kn) ↓ | 1.5 kn | 0.3 m · 10 s ↓ | ↓ falling | 12.7 °C | 10 °C | – | gusts | ||
| 1.7 m | 20 (33 kn) ↓ | 1.6 kn | 0.3 m · 10 s ↓ | ↓ falling | 12.7 °C | 10 °C | – | waves | ||
| 1.8 m | 21 (34 kn) ↓ | 1.2 kn | 0.4 m · 10 s ↓ | ↓ falling | 12.8 °C | 11 °C | – | waves | ||
| 1.9 m | 20 (34 kn) ↓ | 0.6 kn | 0.4 m · 10 s ↓ | ↓ falling | 12.8 °C | 11 °C | – | waves | ||
| 1.9 m | 21 (35 kn) ↓ | 0.6 kn | 0.5 m · 9 s ↓ | Low ~19:00 | 12.8 °C | 11 °C | – | gusts | ||
| 1.9 m | 20 (34 kn) ↓ | 1.2 kn | 0.6 m · 7 s ↓ | ↑ rising | 12.8 °C | 10 °C | – | waves | ||
| 1.8 m | 21 (34 kn) ↓ | 1.9 kn | 0.7 m · 6 s ↓ | ↑ rising | 12.8 °C | 10 °C | – | waves |
Waves and swell are adjusted for this site's shelter from the coastline. Arrows point where the wind and swell go. Night hours are shaded. Tide times come from an ocean model: usually within about half an hour, more in complex waters. Check official tide tables.
Water at depth
13 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. High confidence.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. High confidence.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Medium confidence.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Medium confidence.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 40 m. No thermocline above that.
Suit: 7 mm with hood, or drysuit for the whole dive.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
Temperature profile and next days
| Day | Surface | Warm to |
|---|---|---|
| Sat 14 Nov | 12.6 °C | ~40 m |
| Sun 15 Nov | 12.7 °C | ~40 m |
| Mon 16 Nov | 12.3 °C | ~40 m |
| Tue 17 Nov | 12.3 °C | ~40 m |
| Wed 18 Nov | 12.2 °C | ~40 m |
| Thu 19 Nov | 12.1 °C | ~40 m |
| Fri 20 Nov | 12.0 °C | ~40 m |
| Sat 21 Nov | 11.9 °C | ~40 m |
| Sun 22 Nov | 11.8 °C | ~40 m |
| Mon 23 Nov | 11.7 °C | ~40 m |
~9 km model grid; nearest model water 2.3 km away. Daily averages; the thermocline can move several metres day to day.
Conditions at Trearddur Bay
Trearddur Bay is open to the sea from the S–W, so waves build there when the wind blows from those directions.
Over the next 7 days it's good or better on Sun and Mon and a no-go on Sat, Tue and Wed (waves and surge). Thu and Fri are only a trend so far.
When it's rough here, try Newry Beach (4.9 km, sheltered from the S–W).
The water is 13 °C at the surface and stays warm past 40 m, so a 7 mm with hood, or drysuit suits most dives.
Shelter
Open to S–W. Waves and swell from there reach the site.
Sheltered from WNW–SSE: land blocks the waves.
Computed from the OpenStreetMap coastline. Wind itself is not reduced by shelter.
Location
Open Trearddur Bay on the map53.2777, -4.6255Nearby dive sites
Scores are today's best daylight hour.
About this forecast
Updated Sat 14 Nov, 15:30 · weather run 06Z 14 Nov · waves run 00Z 14 Nov
Waves are adjusted for this site's shelter from the coastline.
Tides come from a coarse ocean model. The range, and whether tides are bigger or smaller this week, are about right. Times are usually within about half an hour, but complex tides (the Solent, Portland, narrow straits) are poor. Slack water isn't in the score yet: plan with official tide tables and local advice.
Water temperature in North Wales
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